As a vendor of complete systems, Siemens offers extensive accessories for telecontrol solutions:

• Antennas for mobile wireless components;
  the appropriate antennas are available for the following mobile wireless components: MD720-3 GSM/GPRS modem, MD741-1 EGPRS router and SCALANCE M870 UMTS router.
• LTOP;
  line transmitter with overvoltage protection for galvanic isolation of a dedicated line modem from the trunk line, and for protection against overvoltage that can be induced over the trunk line.
• Quadruple transformer;
  for the multiplication of the trunk line connection of a dedicated line modem from 1 x 2-wire to 4 x 2-wire
• Connecting cables;
  a comprehensive range of connecting cables provides the right connection for every application. For example, it is possible to connect TIM and modem modules simply and rapidly.
• PPI modem cable;
  intelligent RS232/PPI multimaster cable for connecting modems with RS232 interface to SIMATIC S7-200
• Accessories for radio clock components;
  required antennas and lightning protection for DCF77 and GPS